0
Research Papers

Experimental Analysis of a Small-Scale Flowing Electrolyte–Direct Methanol Fuel Cell Stack

[+] Author and Article Information
Yashar Kablou

Department of Mechanical
and Aerospace Engineering,
Carleton University,
1125 Colonel By Drive,
Ottawa, ON K1S 5B6, Canada
e-mail: yashar_kablou@carleton.ca

Cynthia A. Cruickshank

Department of Mechanical
and Aerospace Engineering,
Carleton University,
1125 Colonel By Drive,
Ottawa, ON K1S 5B6, Canada
e-mail: ccruicks@mae.carleton.ca

Edgar Matida

Department of Mechanical
and Aerospace Engineering,
Carleton University,
1125 Colonel By Drive,
Ottawa, ON K1S 5B6, Canada
e-mail: edgar.matida@mae.carleton.ca

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received March 24, 2014; final manuscript received July 31, 2015; published online September 7, 2015. Editor: Wilson K. S. Chiu.

J. Fuel Cell Sci. Technol 12(4), 041007 (Sep 07, 2015) (7 pages) Paper No: FC-14-1033; doi: 10.1115/1.4031423 History: Received March 24, 2014; Revised July 31, 2015

A small-scale five-cell flowing electrolyte–direct methanol fuel cell (FE-DMFC) stack with U-type manifold configuration and parallel serpentine flow bed design was studied experimentally. The active area of a single cell was approximately 25 cm2. For every stack cell, diluted sulphuric acid was used as the flowing electrolyte (FE) which was circulated through a porous medium placed between two Nafion® 115 polymer electrolyte membranes. The stack performance was studied over a range of several operating conditions, such as temperature (50–80 °C), FE flow rate (0–17.5 ml/min), methanol concentration (0.5–4.0 M), and methanol solution flow rate (10–20 ml/min). In addition, the stack cell to cell voltage variations and the effects of the FE stream interruption on the output voltage were investigated at various operating loads. Experimental results showed that utilization of the FE effectively reduced methanol crossover and improved the stack power output. It was found that increasing the FE flow rate enhanced the stack capability to operate at higher inlet methanol concentrations without any degradation to the performance. The results also demonstrated that the stack power output can be directly controlled by regulating the FE stream especially at high operating currents.

FIGURES IN THIS ARTICLE
<>
Copyright © 2015 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Schematic of a two-cell FE-DMFC stack

Grahic Jump Location
Fig. 2

Two types of parallel manifold configurations

Grahic Jump Location
Fig. 4

(a) Half-cell assembly and (b) full stack assembly

Grahic Jump Location
Fig. 5

Schematic of the experimental setup

Grahic Jump Location
Fig. 6

Stack polarization/power curve variations with temperature

Grahic Jump Location
Fig. 7

Stack polarization/power curve variations with FE flow rate

Grahic Jump Location
Fig. 8

Effects of FE flow rate and methanol concentration on stack maximum power density

Grahic Jump Location
Fig. 9

Stack polarization/power curve variations with methanol concentration

Grahic Jump Location
Fig. 10

Stack polarization/power curve variations with methanol solution flow rate

Grahic Jump Location
Fig. 11

Stack voltage distributions at various operating currents

Grahic Jump Location
Fig. 12

Effects of FE flow interruption on stack performance at various operating currents

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In